Ore-mill



(No Model.) 2 Sheets--Sheet 1. W. BAINBRIDGE.

ORE MILL.

No. 413,014. PatentedOct. 15, 1889.

| amen 1m 4 Q- IHJI fiw Whitman-ea 4 an M (No Model.) 2 Sheets-Sheet 2.

W. BAINBRIDGE.

ORE MILL.

Patented Oct. 15, 1889.

u. PETERS. Pholmhugnphu. Wadvingluix 11 :2V

FFICE.

W'ILLIAM BAINBRIDGE, OF OMAHA, NEBRASKA.

ORE-NULL.

SPECIFICATION forming part of Letters Patent No. 413,014, dated October15, 1889. Application filed December 17, 1888. Serial No. 293,783. (Nomodel) To all whom it may concern:

Be it known that I, WILLIAM BAINBRIDGE, a citizen of the United States,residing at Omaha, in the county of Douglas and State of Nebraska, haveinvented certain new and useful Improvements in Ore-Mills; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to an improvement in mills for the separation ofores, and has for its object to provide a simple, compact, and durablemill which will rapidly pulverize ores of high. or low grade thatcontain minerals of refractorynature.

A further object is to produce an ore-mill which will contain withinitself means for effectually pulverizing, scourin g, and separating freemineral from the gangue, and, further, that will separate free mineralfrom the ore by amalgamation and concentrate the refractorymatterpreparatory to treatment by the smelting process.

\Vith these objects in view my invention consists in certain features ofconstruction and combination of parts that will. be hereinafterdescribed, and pointed out in the claims.

Referring to the accompanying drawings, making part of thisspecification, Figure 1 is aside elevation of the ore mill; Fig. 2, avertical section of the mechanism and supporting frame with the drivinggear removed, showing the central spindle in perspective; Fig. 3, afragmentary plan view of one of my scouring-disks on an enlarged scale;Fig; 4, a vertical section of my series of cone-disks, showing thespindle in perspective, but broken away to show the feather-key m; andFig.5, a section of a portion of one of my sconring disks, showing thegrooves on the upper and under surfaces.

A represents any suitable frame for the mill which supports the centralvertical spin dle 3 and the vertical side shaft K. The latter isprovided with two spur-pinions P and O, which engage a gear-rim d on thehopper C and the ge'anrims d on the conedisks 2 4 6. This shaft isfurther provided with a bevel-pinion K, which engages a bevel pinion Kon horizontal pulley-shaft M, which shaft drives the spindle B by meansof bevel-gears M and B both the shafts B and K being revolved in onedirection by the pulley M Hopper G, which is a pug-mill shell, iscentrally located with respect to spindle B and rests upon collar 1),but is not attached there-' to. The hopper is further provided with anexternal gear-rim cl, engaged by spur-pinion P and resting uponfriction-wheels c, which afford support for the hopper. Hopper O issubstantially cup-shaped, the side wall being flattened, as at c c, andthe inner surfaces of said wall being composed of a series of spacedribs or corrugations h, which are highest about midway between thebottom and the top of the hopper and tapering toward either end, asshown in Fig. 2.

lVithin the hopper O a grinding-shell C is located and keyed to revolvewith the spindle B by means of spline m". The upper part of saidgrinding-shell'is allowed a vertical movement on shaft B to adjustitself to the amount of ore in the hopper, and consists of a crown-platef, provided with a perforated hub e, which embraces the shaft B, saidcrownplate having an integral depending skirt f, that forms thegrinding-face of the disk, as will be further explained in proper order.The skirt f is contracted from its top to the base or lower edge,producing a conical peripheral surface, the lower edge of this skirtresting upon the outer edge of the base-piece g, as shown in Fig. 2. Thelower part of basepieee g has the shape of a double cone and is rigidlyfastened to the central spindle B, thus insuring complete pulverization.of the ore. Grinding-diskG is also provided with external radial ribs orcorrugations, V-shaped in cross-section,which cover the surface, havingtheir maximum height at the top of the grinding-disk, tapering towardthe bottom and center, and ending at hub c'.

In the bottom of the hopper C and near the hub c'orifices 7c are formedfor the exit of the pulverized ore. As will be observed, the annularspace afforded between the hopper wall and the skirt f diminishes fromthe top of the hopper to the orifices 7.1, which is essential to producea gradual comminution of the ore fed into the hopper'through its opentop.

Immediately below the hopper C an orcreceiving-pan or washer D, thedished por- Washer D is placed upon spindle B, which washer consists ofa circular pan, the bottom of which is concentrically depressed near theperipheral upright wall of the pan, so as to reduce an annular chamber Dthe inner It will be noticed that the boss or hub B has its truecylindrical upper end seated within an annular groove b cut in the lowersurface of a fixed collar b, and that it is of equal height with theouter peripheral Wall of the tion D being from its position adapted toreceive the ground material that is discharged through the holes 70,formed in the base of the hopper O. A series of spaced discharge-holes kare formed around the vertical wall of the boss D through which theheavy concentrated mineral will be mechanically forced by action of afixed scraper F, while the lighter liquid refuse or gangue is caused toflow over into the annular chamber D, from which it is removed by thesiphon-tube F and discharged.

Beneath the washer D a series of depending scouring-disks 1 2 3 4; 5 6,all of hardened metal, are centered on the spindle B. upper disk 1 andeach alternate disk 3 and 5 are perforated centrally and engaged by thefeather-key m, which is extended down sufficiently to afford verticalplay for the disks upon the spindle 13, while they are at the same timemade to rotate with it. The conic disks 2 and 4 are interposed betweenthe disks 1 and 3 and 3 and 5, which last is supported on the lower disk6, that is rotatively sustained upon the spindle B by its contact withthe sloping base of the collar 7, firmly secured to the spindle by aset-bolt or .other suitable means. Each of the alternate disks 1 3 5 aresecured to rotate with the spindle B, as previously stated, while theother disks 2 4 6 are not so attached, but are loosely seated upon thewashers n, which embrace the spindle and its feather-key, while the boreof the disks is of such relative diameter as to rotatively fit thecircumference of the Washers n, and thus secure the disks from lateralplay. The disks 2 8 at 5 U have radially-extending grooves 19 formed intheir upper surfaces and have flat bottoms and flaring side Walls. Thesegrooves are deep, narrow, and sharply defined near the orifices 0,through which they are fed, and they become shallower and broader asthey diverge from the central spindle, and cease entirely at abouttwo-thirds the distance from the same to the outer periphery, leavingthe remaining portion. to serve a scouring-surface, as shown in Fig. 3.In the under side of disks 1 2 3 4 5, and radiating from their axes, arethe recessed arched or concaved grooves q, haying sharply-definedopenings at orifices 0 Th e and becoming shallower and wider toward theouter periphery, ceasing at about twothirds of the distance to the same,as in the case of the grooves in the upper side. The orifices 0 arearranged to register with the aperture k in the bottom of the washer-panD.

The loose scouring-disks 2 4 6 are each furnished with anupwardly-curved peripheral edge, which by its form affords a gutter tfor the reception of the pulverized matter which escapes from betweenthe faces of the grinding conic disks, and a series of holes 19 areformed in each of these gutters for the discharge through them of thepulverized matter, and it will be seen that the edges of the other disks1 3 5 do not extend to the channels formed by the disks 2 at 6.

On the peripheries of the conic disks 2 at 6 gear-teeth are cut of thesame pitch, thus in effect forming'a composite gear-wheel, as theadjacent surfaces of these gear-rims have bearing contact with eachother. These disks receive rotary motion independent of and in anopposite direction to the intermediate disks 1 3 5 by the engagement oftheir gearrims with the spur-pinion O and are separately movable toadjust themselves to the ore between them.

Fastened to the cog-rim of the lower conedisk (3 and adjusted to rotatewith it is an inverted conical shell or receptacle G, centrally locatedon the shaft B and supported thereon by the hub 21 of the receptacle 1.

A scouring-disk G is superposed upon the sloping sides of the disk G,and is revolved with spindle B by means of the feather-key m, upon whichit is vertically movable. The receptacle Gis provided with orifices 0",which are directly above the pan 1, which pan is similar in shape to theupper pan D.

The receptacle I is loosely mounted on the spindle B, and is supportedand held stationary by 'means of the standards y, Which are secured tobase of the frame A. The inner chamber or trough s of this receptacle Iis provided with an orifice s, which may be opened and closed by anysuitable means, such as slide .2. The outer annular recess or trough Jhas a series of pockets 1, provided with removable capsI". Aspring-supported brush or weight L isattached to the under side of shellG in such a manner as to be dragged around in the trough J when theshell rotates and brush the scoured mineral into the pockets 1.

Having set forth the preferred manner of constructing my machine, I willnow describe its operation.

The side shaft K and spindle B are both driven in unison in the samedirection by the horizontal pulley-shaft M through the medium ofbevel-gears K K and M B lVhile the spindle 15 rotates the variousgrindingcones and washing-pan in one direction, the side shaft K, bymeans of its pinions O and P,driv'es the hopper Oand conic disks 2 at 6in the opposite direction, whereby the grinding and pulverizing actionis set up. Then the machine is thus set in action, the ore is fed intothe hopper O, and as it passes down between the grinding-shell O and thehopper it becomes gradually broken or pulverized and discharges throughthe orifices down into the dished portion D of the. rotary pan D. Herethe heavier portions settle and issue through the openings 70 in thebottom of the dish, while the lighter portions are thrown over by thescraper into the annular recess D. As this pan revolves, the heavier portions which pass through the openings k pass into the openings 0 andthence into the grooves of theconic disks, where they are furtherpulverized or scoured. In this sec- 0nd pulverizing and scouringoperation the particles of free metal are triturated by theoppositely-revelving disks, which disks adjust themselves to the amountand fineness of the ore between them and discharge the whole into theinverted cone-receptacle G through the series of openings p in thebottom of. the annular gutters t. These openings, being coincident invertical series and traveling in such position with the conic disks 2 46, allow the discharged pulverized material to pass down directlythrough into the receptacle G. By giving the slots gradual diminishingdepth and making the lower portion of the disks plane the materialtreated is reduced to an exceedingly fine condition before delivery intothe receptacle below. The richer and heavier proportions of thepulverized ore, being delivered into the receptacle G just above theinternal scouring-disk G, are still further scoured and ground bypassing between these two parts. The inner disk G moves vertically uponthe spindle I), yet by means of the feather-key m it is made to revolvewith the spindle. This adjustment allows the lighter portions to passover its upper surface, while the heavier particles pass between them,both products passing out through common openings 1' in the flattenedbottom of the receptacle, and thence down into the dish 8 of thestationary receptacle I. This dish .9 has been first filled with mercuryor sodium amalgam, which eliminates the metallic particles from the orein the well-known manner and the amalgam so formed may be removed fromtime to time through the opening .9 in the bottom of the dish. Theconcentrates pass over the gently-sloping wall of the dish 3 into theannular recess J, where they are brushed by the pendent weight L intothe ritfles or pockets I, and these pockets, being covered by removablecaps I, may be emptied from time to time. The liquid gangue is siphonedoff. Thus it will be observed that the ores may be by successive stagespulverized, scoured, and concentrated and the free me tallic particlesamalgamated.

It will be apparent that either wet or dry ore may be passed through mymachine, the siphons being provided for wet material.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. I11 an ore-pulverizing machine, the combination, with a hopper, of agrinding-disk composed of two sections, the uppersection having a rotaryand a free vertical movement and the lower a rotary movement only, andmechanism to operate the hopper and grinding-disks in oppositedirections, substantially as described.

2. In an ore pulverizing and concentrating machine, the combination,with a hopper, a vertically-reciprocating grinding -disk, and mechanismto rotate these parts oppositely, of a washer-pan that is rotated by thesame spindle that revolves the grinding-disk and a fixed scraper,substantially as set forth.

3. In an ore pulverizing and concentrating machine, the combination,with a washer-pan and a fixed scraper, of a series of conic disksprovided with grooves and arranged so that adjacent disks will rotate inopposite direc tions, substantially as set forth.

4. I11 an ore-pulverizing device, the combination, with a hopper havingtapering grinding-ribs and an external gear-rim, of a grinding-diskhaving free vertical play and mechanism to revolve the grinding-diskandhopper in opposite directions, substantially as described.

5. In an ore-pulverizing machine, the combination, with a rotatinghopper having a series of tapering grinding-ribs, of an inverted conicalgrinding-disk that has tapering ribs on its surface and is composed oftwo sections, one of. which has free vertical play, and mechanism torotate the grinding-disk and hopper in opposite directions, in themanner and for the purpose described.

6. In an ore pulverizing and concentrating machine, the combination,with a hopper forming a portion of a pug-mill, a conical grinding-diskcomposed of two sections, one

vertically movable and the other fixed, and means to rotate the cylinderand hopper oppositely, of awashing or concentrating chamber locatedimmediately below the hopper, having a dished bottom. and an integralannular outer chamber, and a scraper to remove the contents of thedished chamber, substantially as set forth.

7. In an ore pulverizing and concentrating machine, the combination of aprimary reducing-mill, a concentrating-chamber, a series ofoppositelyactuated scouring-disks, an amalgamating-chamber, all mountedon a common shaft, and a concentrating and set tling chamber with anoperating mechanism which is adapted to rotate the mill andscouring-disks, substantially as set forth.

S. In an ore pulverizing and concentrating of scouring conic disks, anda lower receivingchamber, all mounted on the same spindle, and a drivingmechanism which is adapted to rotate the mill and disks to affordgrinding action in each independent of the other, substantially as setforth.

9. In an ore pulverizing and concentrating machine, the combination,with a milling device that operates on the crude ore and reduces it topowder, a receptacle located immediately below it, a series of conicgrindingdisks, and an inverted conic disk located below and containing acorresponding plainfaced disk mounted to rotate with the spindle, of arigid amalgamating-receptacle located below the latter, a spindle thatsupports the milling and concentrating devices, and mechanism adapted toafford rotary motion to the milling devices, substantially as set forth.

10. In an ore-pulverizing machine, the combination, with a cup-shapedhopper having a central boss perforated to receive a spindle andorifices near said boss for the passage of the ore, of a grinding-diskcomposed of two sections, the upper section capable of free verticalplay and the lower having a rotary motion only, and mechanism to rotatethe parts, substantially as described.

11. In an ore-grinding machine, a series of oppositely-actuatedgrinding-disks provided with a series of feed-orifices near the center,and grooves in the upper and lower surfaces of the disks, which groovesopen into said feed-orifices and are deep near the center and becomewide and shallow as they proceed from the center, ending before theyreach the periphery, and mechanism for oppositely revolving said disks,substantially as described.

12. In an ore-grinding machine, a series of oppositely-actuated conicalgrinding-disks provided with a series of feed-orifices near the centerwhich register with each other, the alternate disks extending beyond theinter mediate disks and forming gutters for the reception of the ores,in combination with mechanism for actuating the same, substantially asdescribed.

13. In an ore-grinding machine, a series of oppositely-actuatedgrinding-disks provided with a series of feed-orifices near the center,and grooves in the upper and lower surfaces of said disks opening fromsaid feed-orifices and extending toward the periphery, and mechanism foroppositely revolving the disks, substantially as described.

14. In an ore-grinding machine, a series of oppositelyactuated conicalgrindingdisks provided wit-l1 a series of feed-orifices near the centerwhich register with each other, the alternate disks extending beyond theintermediate disks forming gutters and having teeth of the same pitchcut in their peripheries, thus forming a composite gear-wheel, andmechanism for oppositely revolving the disks, substantially asdescribed.

15. In an ore-grinding machine, a series of oppositely-actuatedgrinding-disks provided with registering feed-orifices and grooves inthe upper and lower surfaces, the alternate disks extending beyond theintermediate disks forming guttersand having teeth of the same pitch outin their peripheries, and mechanism for revolving the same in oppositedirections, in the manner and for the purpose substantially asdescribed.

16. In an ore-grinding machine, a series of oppositely-actuated conicaldisks, alternate disks being keyed to a central spindle, andintermediate disks extending beyond the others forming gutters, in thebottom of which are registering discharge-openings, in combination withan inverted conical shell whose outer periphery fits the outer peripheryof the lower cone-disk and is fastened to and revolved by it, and aninner inverted cone-disk keyed to the central spindle, and mechanism foroppositely revolving the spindle and'intermediate disks, substantiallyas described.

17. In an ore-grinding machine, a series of grinding-disks alternatelykeyed to a central spindle, the intermediate disks being extended beyondthe others, having teeth of the same pitch out in their peripheries, andwith central perforations which fit collars on the central spindle toadmit of independent rotation, in combination with said central spindleand collar and mechanism for oppositely revolving the disks, in themanner and for the purpose set forth.

18. In an ore-grinding machine, a series of oppositely-revolvinggrinding-disks, in combination with an inverted conical shell fittingthe lower grinding-disk, and an inner inverted conical disk havingvertical play and revolved in a direction opposite to that of theconical shell, and mechanism for oppositely revolving the invertedconical shell and conical disk, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM BAINBRID GE.

Witnesses:

THos. D. HALL, JOHN F. HAMMOND.

